PM20 IFIS database
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资源简介：
This is the latest state of the IFIS database, which holds metadata about the 20th Century Press Archives (PM20) and was maintained by ZBW - Leibniz Information Centre for Economics until 01/2024. According to the Open data policy of ZBW re. PM20 metadata, it is published here under CC0 licence. Database and according record and field documentation was dumped from Postgres 9.2 (2024-01-29).
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Zenodo创建时间：
2024-01-30
